Hi all! I’ve been lurking the forums for a little while and figured I’d make an account and introduce myself. Not my first time tooling with engines in general, although I’m more used to working on motorcycles and other small displacement engines rather than large land yachts. Anyways, around the beginning of the year I bought myself a 1986 Cadillac Fleetwood Brougham as my first car and have been having a “blast” with it since. I know it’s not quite an Oldsmobile, but since it’s has an olds 307 in it. It’s basically just an early 80’s olds 98 but with more leather and faux wood paneling right? Anyway I’ll be back to lurking.

 

Welcome. That time was getting toward the end of body-on-frame-V8 era. I never knew Cadillac was using the Olds 307 in those cars.

Cheers
Chris

 

Welcome, cool Oldsmobile powered luxo-barge.

 

Welcome to the site

 

Welcome aboard! This is the best site for all things Oldsmobile!

 

Welcome , interesting that there is a 307 in your car . i also have a large Land Yacht .

 

Initially I also thought it was strange that there was an olds motor in a Cadillac. I guess that Cadillac starting prioritizing the HT 4100’s for the rest of the line after they downsized in 85. Good riddance too, those motors were terrible for those huge caddies during the early 80’s. I’m pretty sure I remember reading that GM also overproduced the 307 and needed to get rid of them. I believe the 307 was one of the last carbureted engines you could buy off a dealership during the 90s.

 

I should have mentioned my land yacht is a 4 door 1982 Delta 88 with a 307 engine . So should be about the same size and weight as your Caddy .

Do you know what transmission you have ? does it have lock up ? My car has the TH 250 C ( C is Lock up ) . if need be some day i would not fix the 250 i have , i would look for a 350 or better . Seeing that the engine is Oldsmobile then i would think your trans would be BOP not Chev.

This is a different thread topic , but FYI the power steering belt is odd ball on my 307 , so i would think odd ball on your 307 as well . Does your Caddy have AC ? I would think your car does have AC .
Seeing that the only thing on your car that is Oldsmobile is the engine and we like pictures then post some pictures of the engine.

 

I have a thm2004r in mine. It’s basically a slightly beefed up thm200 with overdrive and torque converter lockup. Interesting how you have a 250c in yours, I thought GM started putting 2004r’s in most of their RWD passenger cars after 81. I think I’ll build mine up when it blows up. There’s a decent aftermarket for the 2004r’s thanks to the turbo Buick crowd.
All of my belts are oddballs. Part of that was because when I got the car my power steering pulley was bent and I had to replace it with a pulley that wasn’t oem spec. So I had to play a little bit of trial and error to figure out what belts would work for the power steering and alternator. Interestingly the a/c compressor, which should’ve still used oem belt numbers was also an oddball. It seems like GM discontinued making the a/c belts so I had to do more trial and error due to the fact most parts sites kept listing belts that were too big for the a/c compressor.

 

you have a good transmission , nice for you to know . could you post a picture of the dash , what the trans shift looks like with a 2004r.

Belts when i meant odd ball , what i meant was not length . Length is easy to sort out . What is odd on my 307 is the alternator belt on my engine does not go around the crank shaft pulley , so the power steering pump belt and AC belt drive the water pump pulley that help turn the alternator . The AC belt on my 307 helps turn the water pump pulley , so even if my AC does not work i have to keep the AC belt on , or the other option for me is to move the alternator to the passenger side of engine . so post some pics of belts on your engine .

 

I’ll get photos to you when I get off work later today.
Your belt routing does sound quite odd. Both my power steering and ac compressor go through the crank pulley. The only pulley that isn't routed to the crank pulley is my alternator.

 

Sorry if the photos aren’t the best but that should give you an idea of what the belt management ought to look like

 

oops i had to edit my above post about my belts . my alternator belt only goes around the water pump pulley . your alternator belt only goes around the power steering pump pulley .

My power steering pump pulley will only take one belt , interesting your power steering pump pulley will take 2 belts .

I see you have a belt missing , the smog pump belt ? Looks like the outer larger pulley on your water pump was for your smog pump . on my engine the outer larger pulley on the water pump is the alternator belt .Seeing that there is no belt on the outer water pump groove , could it be an option for you to put on a much longer alternator belt and have it go around the water pump and power steering pump pulley !

 

If I remember correctly the alternator did originally run on the larger outer groove on the water pump pulley. I have to run the alternator on the power steering pulley since the second row doesn’t line up with the pulley on the water pump. I don’t have an air pump belt cause the pulley was seized when I got the car. It’s not like the air pumps are really needed anyway. The car has been running fine without it.

 

I would think that as long as you have your power steering belt going around the crank pulley you actually wouldn’t need your ac belt. Just as long as you have one belt going around your crank pulley and water pump pulley your alternator should be spinning. Although ideally you would have both ac and power steering belts. If you only have one or another it causes ALOT of squealing. I have also heard mention of having only one of those causing more wear on your water pump pulley bearings. Though not much.